How can I delete typed URLs in my Internet Explorer 7?

I have multiple URL’s in my address bar in Internet Explorer 7, and I want to delete some of it but don’t know how.
I also want to know how to do this since I always logged on to my email account on the computer on my office. I’m afraid that someone might accidentally click on the links and get access with my personal mails.
I am running Windows Vista Home Premium on both computers.
Please help on how to clear the links in my address bar.

Thanks.
